TY - CHAP
T1 - Packet Error Rate(PER)-based Cross-layer Optimization of CDMA Networks
AU - Shojaeifard, A.
AU - Zarringhalam, F.
AU - Shikh-Bahaei, M.
PY - 2011
Y1 - 2011
N2 - In CDMA systems, outer loop power control (OLPC) determines the target value of SNR at the receiver, mostly by using look-up tables to map bit error rates (BERs) to SNR-targets. In this contribution, transmission delay and packet loss rate constraints in the data link layer (DLL) are invoked in order to determine the optimum outer loop SNR-target setpoint analytically, according to the number of active users in cell. Optimality is, in this sense, the maximization of system throughput. Using the optimum SNR-target, the optimal spreading factor is determined. Subsequently, the joint optimization of outer loop SNR-target and variable spreading factor (VSF), at the physical(PHY)-layer, with truncated automatic repeat request (ARQ) error control mechanism at the data link layer are proposed. Our scheme is compared with 'constant SNR-target' and 'PHY-layer based variable SNR-target' cases under continuous power and rate variation to show (analytically and by simulations) the achievable gain through the coupling of physical and data link layers parameters.
AB - In CDMA systems, outer loop power control (OLPC) determines the target value of SNR at the receiver, mostly by using look-up tables to map bit error rates (BERs) to SNR-targets. In this contribution, transmission delay and packet loss rate constraints in the data link layer (DLL) are invoked in order to determine the optimum outer loop SNR-target setpoint analytically, according to the number of active users in cell. Optimality is, in this sense, the maximization of system throughput. Using the optimum SNR-target, the optimal spreading factor is determined. Subsequently, the joint optimization of outer loop SNR-target and variable spreading factor (VSF), at the physical(PHY)-layer, with truncated automatic repeat request (ARQ) error control mechanism at the data link layer are proposed. Our scheme is compared with 'constant SNR-target' and 'PHY-layer based variable SNR-target' cases under continuous power and rate variation to show (analytically and by simulations) the achievable gain through the coupling of physical and data link layers parameters.
UR - http://www.scopus.com/inward/record.url?scp=84857205026&partnerID=8YFLogxK
M3 - Conference paper
SN - 978-1-4244-9268-8
T3 - 2011 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE (GLOBECOM 2011)
BT - Unknown
PB - IEEE
CY - NEW YORK
T2 - 54th Annual IEEE Global Telecommunications Conference (GLOBECOM)
Y2 - 5 December 2011 through 9 December 2011
ER -